from __future__ import absolute_import, unicode_literals import os from django.core.management import call_command from django.test import TestCase, TransactionTestCase from django.test.utils import extend_sys_path from django.utils._os import upath from .models import (ConcreteModel, ConcreteModelSubclass, ConcreteModelSubclassProxy) class ProxyModelInheritanceTests(TransactionTestCase): """ Proxy model inheritance across apps can result in migrate not creating the table for the proxied model (as described in #12286). This test creates two dummy apps and calls migrate, then verifies that the table has been created. """ available_apps = [] def test_table_exists(self): with extend_sys_path(os.path.dirname(os.path.abspath(upath(__file__)))): with self.modify_settings(INSTALLED_APPS={'append': ['app1', 'app2']}): call_command('migrate', verbosity=0) from app1.models import ProxyModel from app2.models import NiceModel self.assertEqual(NiceModel.objects.all().count(), 0) self.assertEqual(ProxyModel.objects.all().count(), 0) class MultiTableInheritanceProxyTest(TestCase): def test_model_subclass_proxy(self): """ Deleting an instance of a model proxying a multi-table inherited subclass should cascade delete down the whole inheritance chain (see #18083). """ instance = ConcreteModelSubclassProxy.objects.create() instance.delete() self.assertEqual(0, ConcreteModelSubclassProxy.objects.count()) self.assertEqual(0, ConcreteModelSubclass.objects.count()) self.assertEqual(0, ConcreteModel.objects.count())